Definition of SOS
1
: an internationally recognized signal of distress in radio code ‧ ‧ ‧ - - - ‧ ‧ ‧ used especially by ships calling for help
2
: a call or request for help or rescue
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Merriam-Webster unabridged
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Time Traveler for SOS
The first known use of SOS was in 1910
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